Bourbon Law 1964: Definition, Straight, and Bottled-in-Bond

Bourbon law in the United States rests on two pillars: a 1964 congressional resolution that declared bourbon a distinctive product of the country, and a set of federal production and labeling standards in 27 CFR Part 5 that spell out exactly what a distiller must do to earn the name. The Alcohol and Tobacco Tax and Trade Bureau (TTB) enforces those rules through permits, label approvals, and civil penalties.

The 1964 Congressional Declaration

Senate Concurrent Resolution 19, passed on May 4, 1964, declared bourbon whiskey a “distinctive product of the United States.” It was a sense-of-Congress statement, not a statute, but it directed federal agencies to block the import of any foreign spirit sold as bourbon.¹ The reasoning cited in the resolution: the United States already recognized Scotch, Canadian whisky, and Cognac as distinctive products of their home countries, and bourbon deserved reciprocal treatment abroad.

The resolution itself did not define bourbon. That work sits in the Code of Federal Regulations, and it is the CFR that decides whether any given bottle can legally use the word.

What a Spirit Must Do to Be Called Bourbon

The federal standards of identity at 27 CFR § 5.143 set five production requirements. Miss one and the product cannot be labeled bourbon.

Notice what is not on that list: a minimum aging period. Standard bourbon has none. The spirit must go into a charred new oak barrel, but the regulations do not say how long it must stay there. Aging minimums only appear once a distiller adds “straight” or “bottled in bond” to the label.

Bourbon Does Not Have to Come from Kentucky

Federal law places no state restriction on bourbon. The regulations define it as a product of the United States, and a distillery in Texas, New York, or Colorado can produce legal bourbon just as easily as one in Kentucky.² Kentucky produces most of the country’s bourbon, but the name is not geographically limited within the United States.

Tennessee whiskey is a related boundary worth flagging. Under the USMCA, Tennessee whiskey is defined as “a straight Bourbon Whiskey authorized to be produced only in the State of Tennessee.”⁴ Trade law treats it as a geographically restricted subcategory of straight bourbon.

What “Straight” Adds to the Label

Straight bourbon must meet two additional requirements beyond the standard five. It must age in its charred new oak barrels for at least two years, and it cannot contain any added coloring, flavoring, or blending materials.⁵

That second rule matters. A bourbon without “straight” on the label may legally contain added coloring or flavoring. Once “straight” appears, those additives are forbidden. What comes out of the barrel is what goes in the bottle, minus water added for proofing.

Age Statements on the Label

Under 27 CFR § 5.74, any bourbon aged less than four years must carry an age statement, and that statement must reflect the youngest whiskey in the bottle. A blend containing anything under four years old triggers the requirement for the whole product.⁶

Once every whiskey in the bottle is four years old or older, the age statement becomes optional. Its absence does not signal a young whiskey. It only means everything inside is at least four. Overstating age is prohibited; understating it is allowed. Age can be given in years, months, or days.⁶

Whiskey labeled “bottled in bond” is the one carve-out from the under-four-year age statement rule, because its own standards guarantee a minimum age.⁶

Bottled-in-Bond: The Strictest Tier

The bottled-in-bond designation, now codified at 27 CFR § 5.88, imposes the tightest set of rules in American bourbon law. Every one of the following must be true:

The spirits were distilled by one distiller at one distillery in a single distilling season.⁷
They were stored in wooden containers for at least four years.⁷
They are bottled at exactly 100 proof (50% ABV), reduced only with pure water.⁷
Nothing may be added or removed except water and standard physical treatments like filtration.⁷

The single-distillery, single-season rule prevents any blending across facilities or production runs, and the four-year floor doubles what “straight” requires. Bottled-in-bond is effectively the highest-guaranteed tier of bourbon under federal law.

When a Spirit Falls Just Short

The charred new oak barrel rule is the most common tripwire. A distiller who follows the grain and distillation rules but uses previously used barrels cannot call the product bourbon. It must be labeled “whisky distilled from bourbon mash.”²

That category also permits added coloring, flavoring, and blending materials, which straight bourbon forbids.² The label change is the regulator’s tool for keeping the categories honest.

International Recognition

The 1964 declaration gave American trade negotiators a lever they have pulled in every major spirits agreement since. Under the U.S.-EU Spirits Agreement, EU member states must recognize bourbon and Tennessee whiskey as distinctive American products and cannot allow a domestically produced spirit to be sold as bourbon.⁸

The USMCA extends the same protection across North America. Annex 3-C requires Canada and Mexico to recognize bourbon and Tennessee whiskey as distinctive products of the United States, and neither country may permit any product to be sold as bourbon unless it was made in the United States under federal standards.⁴

Federal Excise Taxes

Bourbon producers pay a federal excise tax on spirits removed from the distillery for sale. The general rate is $13.50 per proof gallon. Under the Craft Beverage Modernization Act, smaller producers pay $2.70 per proof gallon on the first 100,000 proof gallons and $13.34 per proof gallon on the next 22.13 million.⁹ For craft distilleries, the reduced rate cuts the per-gallon burden by roughly 80% on early production.

Enforcement and Penalties

Every distillery operates under a federal basic permit issued by the TTB. The agency can suspend, revoke, or annul that permit if a producer willfully violates its conditions, fails to operate in good faith for more than two years, or obtained the permit through fraud.¹⁰ Losing the permit closes the operation.

Labeling violations are handled separately under the Alcoholic Beverage Labeling Act. Each day a violation continues counts as a separate offense, and the maximum civil penalty per violation is $26,225 as of January 2025.¹¹ A distillery that mislabels a product as bourbon when it does not meet the standards can accumulate significant exposure quickly.

1
GovInfo. 78 Stat. 1208 – Bourbon Whiskey Designated as Distinctive Product of U.S.
2
eCFR. 27 CFR Part 5 Subpart I – Standards of Identity for Distilled Spirits
3
eCFR. 27 CFR Part 5 – Labeling and Advertising of Distilled Spirits
4
USTR (United States Trade Representative). Annex 3-C: Distilled Spirits, Wine, Beer, and Other Alcohol Beverages
5
eCFR. 27 CFR 5.143 – Whisky
6
eCFR. 27 CFR 5.74 – Statements of Age, Storage, and Percentage
7
eCFR. 27 CFR 5.88 – Bottled in Bond
8
TTB: Alcohol and Tobacco Tax and Trade Bureau. U.S./EU Spirits Agreement
9
TTB: Alcohol and Tobacco Tax and Trade Bureau. Tax Rates
10
eCFR. 27 CFR Part 71 Subpart E – Grounds for Citation
11
TTB: Alcohol and Tobacco Tax and Trade Bureau. Alcoholic Beverage Labeling Act Penalty